Across
- 2. a concise statement that summarizes the results of many observations and experiments; Scientific _____
- 4. this type of property states that density depends on the type of matter present, not the amount of matter present
- 6. region of space around the nucleus with a high probability of finding a given electron
- 10. subatomic particle in the nucleus of an atom that distinguishes elements from each other
- 11. a quantum of light
- 13. The amount of energy required to move an electron from one energy level to another
- 14. the order in which electrons are arranged around the nucleus of an atom is called electron ________
- 16. the study of matter and its changes
- 19. anything that has mass and takes up space
- 20. electrons in the outermost energy level
- 21. the amount of three-dimensional space occupied by a substance
Down
- 1. this substance has a density of 1 g/mL
- 3. the formula for the speed of light is frequency multiplied by _______
- 5. number of wave cycles passing a given point per unit time
- 7. the last name of the person who proposed that electrons move in orbits and have fixed energy levels
- 8. a thoroughly tested model that explains why experiments give certain results; Scientific ______
- 9. _______ number is equal to the number of protons in the element
- 12. the last name of the person who discovered the electron
- 15. the charge an atom will have if the number of electrons is greater than the number of protons
- 17. the last name of the person who discovered that the atom is the smallest unit of matter, and it is indivisible
- 18. two or more atoms chemically bonded